Machine for cutting out mica between segments in commutators.



- 0. F. KEINEN.` MACHINEFOR CUTTING- OUT MIGA BETWEEN SEGMENTS IN GOMMUTATORS.

APPLICATION FILED SEPT. 30, 1907.

906, 1 60. Patented Dec. 8, 1908.

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MACHINE FOR CUTTING OUT MICA BETWEEN SEGMENTS IN GOMMUTATORS.

APPLICATION FILED SEPT. so, 1907.

'906, 1 60 v Patented Dec. 8 1908.

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NETE@ STATES VPATENT OFFICE.

OTTOQFRANK REINEN, VOF LOSANGrELES, CALIFORNIA.

MACHINE FOR CUTTING OUT MICA BETWEEN SEGMENTS IN COMMUTATORS.

To all whom t may concern:

Be it known that I, Orro FRANK REINEN, a citizen of the United States, residing at Los Angeles, county of Los Angeles, State of California, have invented a Machine for Cutting Out Mica between Segments in Commutators, of which the following is a specification.

This invention relates to a machine designed to be used in a repair shop for cutting out mica between the segments of the commutator of an armature after truing the same, thus making a good contact between the brushes and commutator. Heretofore the mica has been trimmed out from between the segments of the commutator by hand, usually with a hack-saw, which is very laborious and consumes much time, and the objects of the present invention are to provide a machine whereby this is accomplished in a perfect manner and with great rapidity.

The accompanying drawings illustrate the invention and referring thereto s--Figure 1 is a side elevation of the machine, showing an armature with commutator in position in the machine ready for the operation. Fig. 2 is a section on line m2-a2 Fig. 1. Fig. 3 is a section on line :v3-w3 Fig. 1. Fig. 4 is an enlarged plan view in detail of a portion of the machine, illustrating the cutter, its arbor and guide, and the commutator end of the armature.

1 designates the armature having commutator 2, the latter having segments 3 spaced apart by mica insulation 4.

5 is the armature shaft. The armature is supported by a truck comprising a frame 6 mounted on axles 7 equipped with wheels 8. Pillow blocks 9 extend up from the frame 6 and their upper ends are concaved, and the shaft 5 of the armature rests in the ends of the pillow blocks 9.

10 is a tongue connected to the truck for moving the truck.

11 designates the bed plate of the machine, upon which rests a carrier frame 12, the latter being swiveled at 13 to the bed plate 11 so that it may be adjusted angularly on the bed plate. Projecting up from each end of the carrier frame 12 is a standard 14. One of the standards is adjustable on the frame as by means of perforations 12', by means of which armatures of different lengths are supported in position for being operated upon. At one end of the bed plate 11 is a Specification of Letters Patent.

Application led September 30, 1907.

Patented Dec. 8, 1908.

Serial No. 395,109.

pair of brackets 15 arranged on opposite sides of the carrier frame, and an adjusting screw 16 is threaded in each bracket 15 and bears against the adjacent standard 14, each adjusting screw 16 having a hand wheel 17, and the screws 16 may thus be adjusted to swing the carrier frame 12 on its swivel 13 to the required position. A step bracket 18 is arranged on each standard 14, and a slide bar 19 is mounted on each standard 14 to slide vertically thereon, having slots 2O through which bolts 21 pass. Each slide bar 19 has a lug 22 in which is journaled a vertical shaft 23, the lower end of shaft 23 being mounted in a step bearing in the step bracket 18, and the lower end of the shaft 23 is provided with'a screw 24 which engages with a stud 25 projecting from the slide bar 19. The upper end of shaft 23 is provided with a hand wheel 26 whereby the screw 24 may be turned to adjust the slide bar 19 vertically with respect to its standard 14. Threaded in each slide bar 19 is a center 27 having a hand wheel 28, the respective centers 27 being adapted to receive the centered ends of the armature shaft 5.

Mounted on the bed plate 11 is a standard 29 to which is bolted a bracket 30 which supports a table 31 which is provided with a pair of slotted ways 32. Slidable in each way 32 is a squared block 33 which is held in position by disks 34 screwed to each face thereof. Journaled in the blocks 33 is an arbor 35. A yoke 36 engages the arbor 35 and is provided with a stem 37 which slides in a stud 38 on the table 31. The end of stem 37 is connected to a hand lever 39 which is pivoted to a link 40, the link 40 being pivoted at 41 to an extension 42 of the table 31. A grooved pulley 43 is mounted on the arbor 35 and a belt 44 drives pulley 43. The outer end of arbor 35 carries a cutter 45 which is a thin disk provided with saw teeth adapted to cut out the mica between the segments 3.

The armature with commutator to be operated on, is first placed on the pillow blocks engagement with the centered ends of the l.

armature shaft 5, which operation is readily accomplished even' though the truck does not stand in position such that the armature shaft is in perfect alinement, as by operating adjusting screws 16 the carrier frame 12 may be adjusted angularly to swing the centers 27 in a horizontal plane alining with armature shaft centers 5, and for vertical alinement the centers 27 may be adjusted up or down vertically by means of the screws 24. Thus, while the armature rests on the pillow blocks 9 and its weight is supported thereby, the centers 27 may readily be engaged with the ends of the armature shaft, and after that has been accomplished the slide bars 19 are adjusted up by operating screws 24 so that the weight of the armature is borne by the centers 27. Then the carrier frame 12 is adjusted to bring the armature shaft 5 into parallelism with the ways 32 of table 81, so that as the cutter is moved along it will, provided the commutator segments are in perfect alinement with the shaft, traverse the slots without cutting into the commutator segments. Quite frequently, however, the commutator segments 3 will not be in perfect parallelism with the axis of shaft 5,

but slightly skewed, and when such is the case the carrier frame 12 is adjusted angularly the necessary slight amount to bring the slot between the commutator segments into perfect parallelism with ways 32, as the essential adjustment to be made is that of securing parallelism between the slots of commutator segments and ways 32. After such adjustment has been effected, the proper elevation of the commutator is secured by operating screws 24 and the commutator is thereby so' adjusted that the cutting depth of the cutter 45 will be the required amount. These adjustments having been made, then by operating hand lever 89, the yoke which carries arbor 35 is advanced to cause the cutter 45 to traverse the slot between two adjacent commutator segments and trim out the required slight amount of mica between the segments. It is obvious that the cutter will traverse the commutator very quickly, and after one traverse the lever 39 is retracted and the armature 5 is turned on its centers 27 to bring the neXt slot into position and the lever 39 is again moved forward to make the next cutting, and so on until the entire number of mica slots have been trimmed. After completing the job, the armature is then lowered so that its shaft 5 again rests in the pillow blocks 9, the left hand standard 14 is again unbolted and the truck supporting the armature is then 'withdrawn from the machine.

What I claim is 1. In a machine for trimming mica in commutatore, a cutter reciprocably mounted so as to be movable in a straight line, a removable commutator support, means for engaging with the commutator and removing it from its support, and means for adjusting said last mentioned supporting means vertically and laterally, relatively to the remov able support and to the cutter, whereby the commutator may be lifted from its removable support and properly adjusted relatively to the cutter independently of said removable support.

2. In a machine for trimming mica in commutators, a cutter reciprocably mounted so as to be movable in a straight line, a wheeled commutator support adapted to be moved relatively toward and from the cutter and to support a commutator while in transit, adjustable means for being moved into engagement with the commutator while upon its support, and adjustable means for engaging with said last mentioned supporting means for removing the commutator from its support and moving it into position relatively to said cutter so as tobe acted upon thereby.

3. In a machine for trimming mica in commutators, a cutter reciprocably mounted so as to be movable in a straight line, a wheeled truck provided with standards, each having an open support at its upper end for holding a commutator, adjustable means adjacent to the cutter for engaging with the ends of the commutator shaft and lifting the commutator from the truck, and means for moving said last mentioned supporting means so as to move the commutator into proper parallelism relatively to the path of the cutter.

4. In a machine for trimming mica 'in commutatore, a cutter reciprocably mounted so as to be movable in a straight line, a wheeled truck provided with two standards for supporting a commutator, two standards adjacent to the cutter, one of which is removable and each. is provided with vertically adjustable means for engaging with the commutator shaft and lifting the commutator from the truck standards, and laterally adjustable means for moving the commutator into proper parallelism relatively to the cutter.

5. In a machine for trimming mica in armatures, a base provided with a standard, a bracket adjustably secured thereto, a cutter reciprocably mounted on the bracket to move in a straight line, a carrier frame swiveled on said base, a standard at each end of said frame, means at one end for adjusting the frame, and vertically adjustable means on each standard for supporting an armature in position for being operated upon by said cutter.

6. In a machine for trimming mica in armatures, a base provided with a standard, a bracket adjustably secured thereto, a cutter reciprocably mounted on the bracket to move in a straight line, a carrier frame swiveled on the base having a standard at each end, oppositely disposed screws at one end of the frame for adjusting it laterally, and vertically adjustable means on each standard for supporting an armature in position for being operated upon by said cutter.

7. In a machine for trimming mica in armatures, a baseprovided with a standard, `a cutter supported by said standard to be moved reciproeably in a straight line, a carrier frame swiveled on the base having a standard at each end, means for moving the frame on its swivel, a step bracket on each standard, a slide bar adjustably mounted on each standard provided with a stud and a perforated bracket, a shaft through said perforation with a wheel on its upper end and having its lower end screw-threaded and seated in the step bracket in position for said threads to engage with said stud, and a supporting center in each bar for holding an armature in position for being operated upon by said cutter.

S. In a machine for trimming mica in armatures, a base adapted to receive a wheeled truck and provided with a standard, a cutter supported on the standard so as to be moved reciprocably in a straight line, a frame swiveled on said base provided with a standard at each end, each standard being provided with adjustable means for engaging with a eommutator, lifting it from the truck and holding it in position to be operated upon by said cutter, and means for adj usting the ends of said frame laterally relatively to the base.

9. In a machine for trimming mica in armatures, a base provided with a standard, a cutter supported on the standard so as to be moved reciproeably in a straight line, a frame swiveled on the base, one end of which is bent upwardly to form a standard and the other end is perforated, a standard removably seated in said perforations, means for adjusting said frame laterally relatively to the base, and means adjustably secured to said standards for supporting an armature in position to be operated upon by said cutter. l

10. In a machine for trimming mica in armatures, a base provided with a standard, a table adjustably supported by said standard, slotted ways on the table, blocks in said ways, an arbor through said blocks provided with a cutter at one end, a yoke for reciprocably moving the blocks along the ways, a handle connected with the yoke for moving it, and adjustable means connected with the base for holding an armature in position for being operated on by said cutter.

1l. In a machine for trimming mica in armatures, a base provided with a standard, a table adjustably supported by said standard, slotted ways and a perforated stud on the table, blocks in said ways, an arbor through said blocks with a cutter on one end, a yoke for reciprocably moving the blocks along the ways, a stem from the yoke through said stud, a handle connected with 'the stem, and adjustable means on the base for supporting an armature in position for being operated on by said cutter.

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this 21st day of September 1907.

OTTO FRANK REINEN.

In presence of- GEORGE T. HACKLEY, FRANK L. A. GRAHAM. 

